While modern versions of the Unity game engine are 64-bit only, it is still possible to access 32-bit versions for older hardware through specific archives. Modern Compatibility Issues Current releases of the Unity Editor and the are no longer available in 32-bit formats Unity Discussions 64-bit Requirement
: Access to thousands of free models, scripts, and textures to speed up the development process. Real-Time Rendering Unity 3d 32 Bit Download Free
For extremely low-end PCs (1-2GB RAM), Unity 5.6.7 is lighter and fully 32-bit. It lacks modern features like Shader Graph but runs on Windows XP SP3 and Vista. While modern versions of the Unity game engine
While 1GB is the bare minimum, 4GB of RAM is strongly recommended to handle the Unity Editor and an IDE like MonoDevelop simultaneously. Graphics: DX10 (Shader Model 4.0) capable GPU. Important Tips for 32-Bit Users Unity download archive It lacks modern features like Shader Graph but